U.S. patent application number 13/773867 was filed with the patent office on 2014-06-05 for power battery cover plate equipped with a current interruption device.
This patent application is currently assigned to NingDe Amperex Technology Limited. The applicant listed for this patent is NINGDE AMPEREX TECHNOLOGY LIMITED. Invention is credited to Pinghua Deng, Zhijun GUO, Peng Wang, Kai Wu.
Application Number | 20140154540 13/773867 |
Document ID | / |
Family ID | 48691079 |
Filed Date | 2014-06-05 |
United States Patent
Application |
20140154540 |
Kind Code |
A1 |
GUO; Zhijun ; et
al. |
June 5, 2014 |
POWER BATTERY COVER PLATE EQUIPPED WITH A CURRENT INTERRUPTION
DEVICE
Abstract
The invention pertains to the field of battery technology, in
particular to a power battery cover plate equipped with a current
interruption device, comprising a cover plate, a positive Terminal,
a vent and a negative teminal, wherein, the positive Terminal, the
vent and the negative teminal are installed on the cover plate; the
negative teminal comprises an upper part of the negative teminal
and a lower part of the negative teminal, in which, the lower part
of the negative teminal is assembled with the upper part of the
negative teminal in an insulated and sealed way, the upper part of
the negative teminal is connected with the lower part of the
negative teminal via an elastic connector, the lower part of the
negative teminal is provided with a notch to which the elastic
connector is corresponding to.
Inventors: |
GUO; Zhijun; (Ningde City,
CN) ; Wang; Peng; (Ningde City, CN) ; Deng;
Pinghua; (Ningde City, CN) ; Wu; Kai; (Ningde
City, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
NINGDE AMPEREX TECHNOLOGY LIMITED |
Ningde City |
|
CN |
|
|
Assignee: |
NingDe Amperex Technology
Limited
Ningde City
CN
|
Family ID: |
48691079 |
Appl. No.: |
13/773867 |
Filed: |
February 22, 2013 |
Current U.S.
Class: |
429/82 |
Current CPC
Class: |
H01M 2/1241 20130101;
Y02E 60/10 20130101; H01M 2/043 20130101 |
Class at
Publication: |
429/82 |
International
Class: |
H01M 2/04 20060101
H01M002/04 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 3, 2012 |
CN |
201220651947.5 |
Claims
1. A power battery cover plate equipped with a current interruption
device, comprising a cover plate (4), a positive Terminal (1), a
vent (2) and a negative teminal (3), wherein, the positive Terminal
(1), the vent (2) and the negative teminal (3) are installed on the
cover plate (4); the negative teminal (3) comprises an upper part
of the negative teminal (31) and a lower part of the negative
teminal (35), wherein the lower part of the negative teminal (35)
is assembled with the upper part of the negative teminal (31) in an
insulated and sealed way, the upper part of the negative teminal
(31) is connected with the lower part of the negative teminal (35)
via an elastic connector (36), the lower part of the negative
teminal (35) is provided with a notch (8) to which the elastic
connector (36) is corresponding to.
2. The power battery cover plate equipped with a current
interruption device of claim 1, wherein the cover plate (4) is
shaped like a rectangle, a round or an oval.
3. The power battery cover plate equipped with a current
interruption device of claim 1, wherein the notch (8) is shaped
like a round or an oval.
4. The power battery cover plate equipped with a current
interruption device of claim 3, wherein the notch (8) has a depth
of 0.05-2 mm.
5. The power battery cover plate equipped with a current
interruption device of claim 4, wherein the notch (8) has a depth
of 0.1-1 mm.
6. The power battery cover plate equipped with a current
interruption device of claim 1, wherein the upper part of the
negative teminal (31) is, successively through a nut (32), an
insulating located block (33) and a sealing ring (34), installed on
the cover plate (4) in an insulated and sealed way.
7. The power battery cover plate equipped with a current
interruption device of claim 6, wherein the upper part of the
negative teminal (31) is, via a spacer (37), arranged on the lower
part of the negative teminal (35).
Description
FIELD OF THE INVENTION
[0001] The invention pertains to the field of battery technology,
in particular to a power battery cover plate equipped with a
current interruption device.
BACKGROUND OF THE INVENTION
[0002] With development of modern society and strengthening of
environmental protection consciousness, more and more devices can
be equipped with selectable and rechargeable secondary batteries as
power supply thereof, such as mobile phones, notebook computers,
power tools, electric automobiles and so on; especially electric
automobiles and energy storage need a power battery of large
capacity, which on one hand provides broad space for application
and development of rechargeable secondary batteries, on the other
hand raises higher demands for batteries, for example, batteries
are expected to have higher capacity, good safety and longer cycle
life etc. Once an accident occurs on a battery when it is subject
to improper battery charging, short circuit or exposure to high
temperature and other severe environment, the high energy battery
may produce a large amount of gas, with temperature rising sharply.
A conventional battery is decompressed by a pressure relief valve
instead of switching off battery cell return circuit. Consequently,
larger safe accidents may be resulted from continuous overcharge of
a battery which has an accident.
SUMMARY OF THE INVENTION
[0003] The invention aims at, in allusion to disadvantages of the
prior art, providing a power battery cover plate equipped with a
current interruption device, wherein a current interruption
structure is disposed on the negative teminal for switching off
current circuit via internal pressure, which can prevent a battery
which has an accident from over-charging, thus avoiding larger safe
accidents resulted from the accident.
[0004] For achieving the above-mentioned objectives, the invention
adopts a technical scheme as below: a power battery cover plate
equipped with a current interruption device, comprising a cover
plate, a positive Terminal, a vent and a negative teminal, wherein,
the positive Terminal, the vent and the negative teminal are
installed on the cover plate;
[0005] The negative teminal comprises an upper part of the negative
teminal and a lower part of the negative teminal, in which, the
lower part of the negative teminal is assembled with the upper part
of the negative teminal in an insulated and sealed way, the upper
part of the negative teminal is connected with the lower part of
the negative teminal via an elastic connector, the lower part of
the negative teminal is provided with a notch to which the elastic
connector is corresponding to.
[0006] The cover plate is shaped like a rectangle, a round or an
oval.
[0007] The notch is shaped like a round or an oval.
[0008] The notch has a depth of 0.05-2 mm.
[0009] The notch has a depth of 0.1-1 mm.
[0010] The upper part of the negative teminal is, successively
through a nut, an insulating located block and a sealing ring,
installed on the cover plate in an insulated and sealed way.
[0011] The upper part of the negative teminal is, via a spacer,
arranged on the lower part of the negative teminal.
[0012] The invention has a beneficial effect in that: the power
battery cover plate equipped with a current interruption device,
comprising a cover plate, a positive Terminal, a vent and a
negative teminal, wherein, the positive Terminal, the vent and the
negative teminal are installed on the cover plate;
[0013] The negative teminal comprises an upper part of the negative
teminal and a lower part of the negative teminal, in which, the
lower part of the negative teminal is assembled with the upper part
of the negative teminal in an insulated and sealed way, the upper
part of the negative teminal is connected with the lower part of
the negative teminal via an elastic connector, the lower part of
the negative teminal is provided with a notch to which the elastic
connector is corresponding to. When the internal air pressure rises
resulted from an accident of an battery cell, a ring piece in the
notch is broken through by the elastic connector, so that the upper
part of the negative teminal is completely separated from the lower
part of the negative teminal, thus rupturing current, preventing
the battery cell from overcharging in case of an accident, and
avoiding larger safe accidents resulted from the accident.
BRIEF DESCRIPTION OF THE DRAWINGS
[0014] FIG. 1 is a vertical view of the invention;
[0015] FIG. 2 is a front view of the invention;
[0016] FIG. 3 is an enlarged view of the negative teminal structure
in FIG. 2; and
[0017] FIG. 4 is an exploded view of the invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0018] The invention is further described in detail with
embodiments and attached drawings. However, the invention is not
limited to the mode of execution.
[0019] Just shown as FIG. 1-4, a power battery cover plate equipped
with a current interruption device, comprising a cover plate 4, a
positive Terminal 1, a vent 2 and a negative teminal 3, wherein,
the positive Terminal 1, the vent 2 and the negative teminal 3 are
installed on the cover plate 4;
[0020] The negative teminal 3 comprises an upper part of the
negative teminal 31 and a lower part of the negative teminal 35, in
which, the lower part of the negative teminal 35 is assembled with
the upper part of the negative teminal 31 in an insulated and
sealed way, the upper part of the negative teminal 31 is connected
with the lower part of the negative teminal 35 via an elastic
connector 36, the lower part of the negative teminal 35 is provided
with a notch 8 to which the elastic connector 36 is corresponding
to.
[0021] Preferably, the cover plate 4 is shaped like a rectangle, a
round or an oval.
[0022] Preferably, the notch 8 is shaped like a round or an
oval.
[0023] The notch 8 has a depth of 0.05-2 mm.
[0024] Preferably, the notch 8 has a depth of 0.1-1 mm; generally,
the notch 8 has a depth of about 0.25 mm; this is because under
modulating control of such a depth, the ring piece in the notch 8
can be subject to a full rupture under an air pressure of 0.3
MPa-0.5 MPa, thus achieving the function of rupturing current.
[0025] Preferably, the upper part of the negative teminal 31 is,
successively through a nut 32, an insulating located block 33 and a
sealing ring 34, installed on the cover plate 4 in an insulated and
sealed way. Insulation can be achieved by adopting surface spray
coating and electroplating etc.
[0026] The upper part of the negative teminal 31 is, via a spacer
37, arranged on the lower part of the negative teminal 35. And the
upper part of the negative teminal 31 is fixed to the lower part of
the negative teminal 35 by the spacer 37.
[0027] From above description, those skilled in the art can change
or modify the above-mentioned embodiments. Therefore, the invention
is not limited to the above-mentioned embodiments. All obvious
improvements, substitutions or modifications of the invention made
by those skilled in the art are within the scope of protection of
the invention. In addition, some specific terms are used in the
specification for the convenience of description, but not to limit
the invention.
* * * * *